The iPhone is great for capturing video, but you might run into some compatibility issues. If you've recorded a video and want to send the raw files to a friend who uses Android or Windows, the video may not play on their device if it's encoded in Apple's new High Efficiency Video Coding (HEVC) or .MOV format.
How to change iPhone video recording format to MP4?
If you are sharing videos with someone who does not have an iPhone, it is best to change the file type to .MP4 format. This format is supported on all major platforms. Fortunately, this is now as easy as converting images or documents.
You can find plenty of video converters on the App Store, but most of them want you to sign up for a $5/month subscription. Instead, you can skip the apps and go straight for online video converters: they’re easy to use, free, and don’t add a watermark to your video. The FreeConvert website is a good option. You can upload videos up to 1GB for free (and the website also supports batch conversion).
If you're concerned about uploading your personal videos to a website and then converting them, FreeConvert has a good privacy policy: all videos are protected with 256-bit SSL encryption and all videos are automatically deleted four hours after conversion.